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Home >> Antibodies >> XBP1 Antibody

XBP1 Antibody (F42468)

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  Catalog No Formulation Size Price (USD)  
Image F42468-0.4ML In 1X PBS, pH 7.4, with 0.09% sodium azide 0.4 ml 399
Image
F42468-0.08ML In 1X PBS, pH 7.4, with 0.09% sodium azide 0.08 ml 185
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XBP1 antibody western blot analysis in mouse lung tissue lysate. Predicted molecular weight: ~29 kDa (isoform 1) and ~40 kDa (isoform 2).
XBP1 antibody western blot analysis in mouse lung tissue lysate. Predicted molecular weight: ~29 kDa (isoform 1) and ~40 kDa (isoform 2).
Availability 1-3 business days
Species Reactivity Mouse
Format Antigen affinity purified
Clonality Polyclonal (rabbit origin)
Isotype Rabbit Ig
Purity Antigen affinity
UniProt P17861
Applications Western blot : 1:1000
Limitations This XBP1 antibody is available for research use only.
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Description

This gene encodes a transcription factor that regulates MHC class II genes by binding to a promoter element referred to as an X box. This gene product is a bZIP protein, which was also identified as a cellular transcription factor that binds to an enhancer in the promoter of the T cell leukemia virus type 1 promoter. It may increase expression of viral proteins by acting as the DNA binding partner of a viral transactivator. It has been found that upon accumulation of unfolded proteins in the endoplasmic reticulum (ER), the mRNA of this gene is processed to an active form by an unconventional splicing mechanism that is mediated by the endonuclease inositol-requiring enzyme 1 (IRE1). The resulting loss of 26 nt from the spliced mRNA causes a frame-shift and an isoform XBP1(S), which is the functionally active transcription factor. The isoform encoded by the unspliced mRNA, XBP1(U), is constitutively expressed, and thought to function as a negative feedback regulator of XBP1(S), which shuts off transcription of target genes during the recovery phase of ER stress. A pseudogene of XBP1 has been identified and localized to chromosome 5.

Application Notes

Titration of the XBP1 antibody may be required due to differences in protocols and secondary/substrate sensitivity.

Immunogen

A portion of amino acids 217-244 from the human protein was used as the immunogen for this XBP1 antibody.

Storage

Aliquot the XBP1 antibody and store frozen at -20oC or colder. Avoid repeated freeze-thaw cycles.

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